java software engineer jobs in London

We are looking for a software engineer to join a lean and technical quantitative trading startup. You’ll be responsible for developing and maintaining scalable trading applications and infrastructure for many financial markets and assist with developing the full stack of infrastructure to support trading operations. The role is fast paced, with daily or...

OverviewJoin to apply for the Software Engineer (Compiler) role at Promon.We are the world's leading Next-Gen Mobile App security company. Promon operates at the center of innovation, emerging trends, and high-end mobile app security solutions. Some of the world's largest enterprises trust us to secure their apps from cyber threats. Working together, our...

Why Sony Interactive Entertainment?Sony Interactive Entertainment isn’t just the Best Place to Play — it’s also the Best Place to Work. Sony Interactive Entertainment (SIE) is the company behind the PlayStation brand. As a subsidiary of Sony Group Corporation, we’re part of a proud legacy of innovation and excellence. SIE is a dynamic technology...

OverviewLead Talent Consultant at Addition+, helping shape the next generation of Military Defence capabilities! (Engineering and Technology)Role: Senior Software Engineer (Python - FastAPI)Location: London (hybrid)Package: Competitive salary + bonus + benefitsIndustry: AI, Data Science & Technology ConsultingSecurity Clearance: Applicants Must have Active...

Architect Strategic Infrastructure: Define and drive the long-term architectural vision for high-availability, low-latency cloud platforms, setting engineering standards that ensure performance, reliability, and portability across our global ecosystem. Lead Modernization at Scale: Spearhead multi-quarter modernization initiatives, driving the transition of...

iOS Software Engineer | Swift, SwiftUI, AI integrations | Fully remote, UK£80,000 to £100,000. Permanent.London. Fully remote across the UK. An iOS role where the AI is the product, and how it feels in someone's hand is down to you. That includes the moments when it is slow, half-finished or unpredictable. Our client is an early-stage AI product company...

Senior Software Engineer - Node.js, Typescript & AWS | Financial Services Location: London | Hybrid - 1 day onsite ; Salary: £75,000 - £ 105,000 About the role: We're looking for a Senior Software Engineer to join our engineering team and build reliable, scalable technology supporting regulated investment and custody services. You'll work in a highly...

Software Systems Engineer I am currently recruiting for a Software Systems Engineer to join a leading organisation based in South Wales. This is a hands on engineering role, sitting at the point where software meets physical hardware. A key part of this position will involve supporting and developing existing VB.NET control software systems, alongside...

36 Labs is a seed-stage startup that started out of the UCL Machine Learning lab. We bootstrapped to 10 people, and now we're on the next leg of growth.AI can generate almost any form of media, but it still can't judge what captures human attention. AI-generated content on social platforms is growing fast, every creative workflow will be agent-assisted or...

Faites un pas en avant et laissez-vous surprendre par Edenred. Chaque jour, nous fournissons des solutions innovantes pour améliorer la vie de millions de personnes, en connectant les employés, les entreprises et les commerçants dans le monde entier. Nous savons qu'il y a des centaines de façons pour vous d'évoluer. Avec nous, vous développerez vos...

Meta is seeking a Software Engineer to build and scale product experiences used by billions of people across Meta's family of apps and platforms. In this role, you will own the design and delivery of complex product features end-to-end, partnering closely with product management, design, data science, and infrastructure teams to ship high-quality, reliable...

We’re looking for a Senior Software Engineer within the Personalised Search team to play a pivotal role in evolving M&S’s Identity Platform. This team provides the critical software capabilities that power authentication, authorisation, and identity management across M&S digital channels, enabling secure and seamless experiences for millions of customers...

(Python, NodeJS or TypeScript, with React and ideally some AI engineering) Summary This is an exciting team of smart and kind engineers -- and they index for both when hiring. They’re looking for a Senior Software Engineer who can ideally work up and down the stack; the technologies and languages are less important to them. It could be Python, NodeJS or...

Salary up to: CompetitiveSenior Software Engineer – Web ExperienceOverall PurposeBuild the customer online ordering experience, the web application customers use every day to order for delivery, click-and-collect and order-at-table, and help steer where it goes next. As a Senior Software Engineer, you'll be one of the most experienced engineers on the...

We see the world differently at Capstone Investment Advisors. You will, too.Capstone is a global, alternative investment management firm operating across a broad range of derivatives-based strategies with a deep understanding of volatility. With approximately $14.6 billion of AUM and 315 employees (as of September 1, 2026, Capstone was formed in 2007 and is...

At EFG (ESL FACEIT Group) we create worlds beyond gameplay where players and fans become community. We pride ourselves in having a corporate social responsibility which is that \"IT'S NOT GG, UNTIL IT'S GG FOR ALL\". We are passionate about the culture we foster that ultimately helps to create and shape the world of esports, gaming tournaments, leagues,...

The Opportunity Join Attest at a pivotal moment: we're transforming how the world's leading brands discover and act on consumer insights. As a Senior Software Engineer on the Measure squad, you'll help grow and evolve Attest Measure, our quantitative survey platform that gives brands robust, at-scale consumer research — from survey design and fielding...

🚀 About BorderlessAt Borderless, we’re building a world where borders are no longer barriers - where anyone can move anywhere, seamlessly and safely. Founded in 2023, we’ve already helped 600+ UK businesses and 15,000+ individuals navigate the complexity of immigration. Powered by technology, and supported by an expert team, our platform removes the...

Senior Software Engineer - AI Start-up - London - In-Office - Up to £200k Base + Equity We’re supporting a category‑leading AI organisation building next‑generation conversational agents used by major global brands. Their platform powers intelligent, human‑like interactions across chat, email and voice, resolving millions of customer queries in real...

We are looking for a Lead Software Engineer to drive technical project delivery, guiding teams from concept to deployment while ensuring high-quality, scalable solutions.If you enjoy seeing your work deployed into ‘real-life’ applications, this is the perfect role for you. Not only will you directly contribute to our client deliverables, but you will...